after further research into this, I found da way, first you will have to give the column you want to apply indexing to a body with an action template "body={this.rowIndexTemplate}", then you need to apply the next code segment as a function in your class:
rowIndexTemplate = (rowData, column) => {
return column.rowIndex + 1 + ""
}
And done, the column you gave the body property to with that same function name will now be indexed according to the row it's in.